Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Schedule of Stock Options Activity (Details)

v3.20.4
Stock-Based Compensation - Schedule of Stock Options Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, Outstanding at end of year 3,624,000    
Options, Exercisable at end of year 1,247,000    
Weighted-average Exercise Price, Outstanding at end of year $ 5.85    
Weighted-average Exercise Price, Exercisable at end of year $ 5.60    
Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, Outstanding at beginning of year 4,078,000 1,220,000 1,290,000
Options, Share-based payments assumed 127,000
Options, Granted 1,230,000 2,829,000 120,000
Options, Exercised (199,000) (59,000) (169,000)
Options, Forfeited or expired (1,485,000) (39,000) (21,000)
Options, Outstanding at end of year 3,624,000 4,078,000 1,220,000
Options, Exercisable at end of year 1,247,000 847,000 695,000
Weighted-average Exercise Price, Outstanding at beginning of year $ 5.79 $ 5.37 $ 5.33
Weighted-average Exercise Price, Share-based payments assumed   4.35  
Weighted-average Exercise Price, Granted 6.08 5.99 6.41
Weighted-average Exercise Price, Exercised 4.72 3.79 5.73
Weighted-average Exercise Price, Forfeited or expired 6.02 6.22 5.96
Weighted-average Exercise Price, Outstanding at end of year 5.85 5.79 5.37
Weighted-average Exercise Price, Exercisable at end of year $ 5.60 $ 5.71 $ 5.07